<td id="td_us_<?= $data['id_user_story'] ?>">
    <?= $data['contenido'] ?>
</td>
<td>
    <input type="button" value="editar" onclick="seleccionar(<?= $data['id_user_story'] ?>)"/>
</td>
<td>
    <input type="button" value="quitar" onclick="eliminar(<?= $data['id_user_story'] ?>)"/>
</td>